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Chapter III: S9 III standard accessories
III.3 The antennas
S9III adopts a UHF all-direction transmitting and receiving antenna. Since there are three
different internal radio settings with different frequency range, the corresponding antennas
have different length. The available range are: 410-430 MHz, 430-450 MHz and 450-470 MHz.
the corresponding antennas have length of: 40, 37,5 and 34 cm. They are suitable for field
surveying, light and durable. The gain is 2.15 dBi.
Fig. 3.7 – built-in radio antenna (not in scale)
S9III adopts a GPRS/GSM all-direction transmitting and receiving antenna with a frequency in
the ranges 824-960 MHz and 1710-1880 MHz. It is suitable for field surveying, light and
durable, the length is about 20 cm, the gain is around 2 dBi .
Fig. 3.8 – Gprs/gsm antenna (not in scale)
